RE: unused blocks BELOW HWM

I believe that the UNUSED_BLOCKS return
value refers to blocks that have never been used, which would be blocks above the HWM.

Jared

                                                                                       
                                     
                    Suhen Pather                                                       
                                     
                    <Suhen.Pather_at_strandba       To:     Multiple recipients of list 
ORACLE-L <ORACLE-L_at_fatcity.com>        
                    gs.com.au>                   cc:                                   
                                     
                    Sent by:                     Subject:     RE: unused blocks BELOW 
HWM                                   
                    root_at_fatcity.com                                                   
                                     
                                                                                       
                                     
                                                                                       
                                     
                    12/17/01 04:45 PM                                                  
                                     
                    Please respond to                                                  
                                     
                    ORACLE-L                                                           
                                     
                                                                                       
                                     
                                                                                       
                                     

Gene,

I do not think you can do this with dbms_space.

The way I normally try to locate if the HWM of a table is too high is:

• analyze each table
• use avg_row_len and num_rows columns from user_tables to calculate the Used Space (you can also put pctfree and pctused into this equation).
• compare the Used Space to the HWM (allocated space - empty blocks -1)
• If the Used Space and HWM are considerably different then you should recreate the table to save *wasted space*.

I am sure this is not the most efficient way of doing this but it works for me.

Regards
Suhen

are u saying try it or are you saying that you can find this info using dbms_space;)

Thx
Deepak
--- "Sairlao, Chark" <SairlaoC_at_transfield.com.au> wrote:
> try dbms_space
>
> Thanks And Regards
> Chark Sairlao
>
>
> -----Original Message-----
> Sent: Tuesday, 18 December 2001 9:40
> To: Multiple recipients of list ORACLE-L
>
>
> no there is not .. unless someone corrects me that
> is
> ;)
>
> Deepak
>
>
> --- Gene Gurevich <g_u_r_e_v_i_c_h_at_yahoo.com> wrote:
> > Hi all:
> >
> > Is there a way for me to see how many blocks under
> > the HWM are unused?
> >
> > thanks
> >
> > Gene
> >

--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Suhen Pather
  INET: Suhen.Pather_at_strandbags.com.au

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).




-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: 
  INET: Jared.Still_at_radisys.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).